What would it take to add LZIP support for package downloads?

I'm trying to set up a package for ddrescue
https://www.gnu.org/software/ddrescue/

and it's only available compressed with lzip (tar.lz)
http://www.nongnu.org/lzip/lzip.html

A manual trial run seems to indicate that it's not a supported format for downloaded packages

/ssd/bcdist/buildroot-2015.05/dl/ddrescue-1.19.tar.lz | tar --strip-components=1 -C /ssd/bcdist/buildroot-2015.05/output/build/ddrescue-1.19 -xf - /bin/bash: /ssd/bcdist/buildroot-2015.05/dl/ddrescue-1.19.tar.lz: Permission denied
tar: This does not look like a tar archive
tar: Exiting with failure status due to previous errors

So, what would it take to add lzip support for downloaded packages? Easy or Oh My?

Steve Kenton

The simple solution is to extend the suitable-extractor function with .lz ->
lzip, and let dependencies.sh check that it's installed on the host. That's a one-line change. But I don't think that many distros have lzip installed, so it's a bit of a hassle for the user.

The intermediate solution is to make the ddrescue package depend on host-lzip
(which obviously you have to add as well), and define a custom extractor.

The full solution is to extend the DL_TOOLS_DEPENDENCIES handling with
dependencies on the host package rather than checks in dependencies.sh.

I propose you go for the simple solution :-)

Regards,
Arnout

Arnout Vandecappelle                          arnout at mind be
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